I've been working on a modular vacuum cleaner robot for around 5 years: https://wolley.se I have done it in my spare time but the dream is to be able to sell it as a kit and work on it full time.
Awesome. I had a similar idea. Maybe we could join forces one day?... I thought about hacking and modding existing robots (I have one at home that has great hardware, but the software is terrible!). Definitely set up a Liberapay account to get support (if you need economic support), although I guess most people would want to see proof of concept first. One thing that would be great is to crowdsource the software, and…
I will in a couple of months have a skeleton/chassi finished and then the "only" thing left is to write the software to make it autonomous. The idea is to keep it really simple in the beginning and let it run on a Raspberry Pi Zero W. Using a Raspberry Pi opens up the platform for more people and software.
Yes, I would want to have something that works fine before starting to sell components, parts or accepting donations etc.